3% of these flying mammals move to other places to find shelters to hibernate. Unlike birds, which travel long distances to escape the cold and fight the lack of food during the winter – the Arctic tern, which is the protagonist of the longest migration in the world, travels 71,000 km – only a few species of bats exceed the 1,000 kilometers per year.
To orient themselves they use an internal magnetic compass that they correct by the position of the sun. In addition, they have smaller brains with which they manage to save weight and energy when traveling.
